A school nurse is providing care to an adolescent who reports they are having difficulty focusing and sitting still in class. Which of the following screening considerations should the nurse identify as important for diagnosing ADHD in the adolescent?

The adolescent should be evaluated for ADHD symptoms that occur in more than one setting over a period of at least six months.

If the adolescent's grades are good, we can rule out ADHD as a possible diagnosis."

Screening for ADHD is most effective when we focus solely on the adolescent's behavior in the classroom.

Since adolescents can be less hyperactive than younger children, we don't consider hyperactivity as a criterion in this age group.